./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3b13662719be51a1d3330a7f40f7706daa8c7b2d4044bc92f854095c09c7c129 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:54:37,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:54:37,184 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:54:37,199 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:54:37,199 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:54:37,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:54:37,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:54:37,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:54:37,259 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:54:37,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:54:37,266 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:54:37,266 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:54:37,267 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:54:37,267 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:54:37,268 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:54:37,269 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:54:37,269 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:54:37,270 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:54:37,270 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:54:37,271 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:54:37,271 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:54:37,273 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:54:37,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:54:37,277 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:54:37,277 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:54:37,278 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:54:37,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:54:37,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:54:37,279 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:54:37,280 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:54:37,281 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:54:37,282 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:54:37,282 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:54:37,282 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:54:37,283 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:54:37,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:54:37,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:54:37,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:54:37,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:54:37,285 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:54:37,285 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:54:37,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:54:37,286 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:54:37,286 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:54:37,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:54:37,287 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b13662719be51a1d3330a7f40f7706daa8c7b2d4044bc92f854095c09c7c129 [2023-11-12 00:54:37,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:54:37,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:54:37,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:54:37,651 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:54:37,652 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:54:37,655 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i [2023-11-12 00:54:40,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:54:41,277 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:54:41,278 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i [2023-11-12 00:54:41,305 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/data/5a48ef7e2/12d2078e1e5a4377a517bf22190b0389/FLAG5b8c655a5 [2023-11-12 00:54:41,322 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/data/5a48ef7e2/12d2078e1e5a4377a517bf22190b0389 [2023-11-12 00:54:41,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:54:41,332 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:54:41,335 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:54:41,335 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:54:41,341 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:54:41,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:54:41" (1/1) ... [2023-11-12 00:54:41,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1954ab5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:41, skipping insertion in model container [2023-11-12 00:54:41,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:54:41" (1/1) ... [2023-11-12 00:54:41,422 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:54:41,874 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i[33822,33835] [2023-11-12 00:54:41,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:54:41,926 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:54:41,965 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i[33822,33835] [2023-11-12 00:54:41,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:54:42,050 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:54:42,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42 WrapperNode [2023-11-12 00:54:42,051 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:54:42,052 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:54:42,053 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:54:42,053 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:54:42,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,128 INFO L138 Inliner]: procedures = 232, calls = 75, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 118 [2023-11-12 00:54:42,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:54:42,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:54:42,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:54:42,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:54:42,157 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,192 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,218 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,226 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,244 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:54:42,247 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:54:42,247 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:54:42,247 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:54:42,249 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (1/1) ... [2023-11-12 00:54:42,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:54:42,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:42,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:54:42,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:54:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:54:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2023-11-12 00:54:42,339 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2023-11-12 00:54:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:54:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:54:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2023-11-12 00:54:42,341 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2023-11-12 00:54:42,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:54:42,342 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-12 00:54:42,342 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-12 00:54:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:54:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:54:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:54:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:54:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-12 00:54:42,344 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-12 00:54:42,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:54:42,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:54:42,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:54:42,495 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:54:42,498 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:54:42,908 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:54:42,986 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:54:42,987 INFO L302 CfgBuilder]: Removed 41 assume(true) statements. [2023-11-12 00:54:42,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:54:42 BoogieIcfgContainer [2023-11-12 00:54:42,990 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:54:42,993 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:54:42,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:54:42,997 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:54:42,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:54:41" (1/3) ... [2023-11-12 00:54:42,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d9a021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:54:42, skipping insertion in model container [2023-11-12 00:54:42,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:42" (2/3) ... [2023-11-12 00:54:42,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d9a021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:54:42, skipping insertion in model container [2023-11-12 00:54:42,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:54:42" (3/3) ... [2023-11-12 00:54:43,000 INFO L112 eAbstractionObserver]: Analyzing ICFG bubble_sort_linux-2.i [2023-11-12 00:54:43,021 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:54:43,021 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:54:43,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:54:43,083 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d6fcce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:54:43,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:54:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 95 states have internal predecessors, (140), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-12 00:54:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:54:43,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:43,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:43,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:43,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:43,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1563842699, now seen corresponding path program 1 times [2023-11-12 00:54:43,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:43,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196011857] [2023-11-12 00:54:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:43,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:43,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:43,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196011857] [2023-11-12 00:54:43,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196011857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:43,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:43,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:54:43,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050773637] [2023-11-12 00:54:43,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:43,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:54:43,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:54:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:54:43,334 INFO L87 Difference]: Start difference. First operand has 105 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 95 states have internal predecessors, (140), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:43,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:43,453 INFO L93 Difference]: Finished difference Result 206 states and 369 transitions. [2023-11-12 00:54:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:54:43,456 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:54:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:43,469 INFO L225 Difference]: With dead ends: 206 [2023-11-12 00:54:43,469 INFO L226 Difference]: Without dead ends: 97 [2023-11-12 00:54:43,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:54:43,483 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:43,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:54:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-12 00:54:43,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-12 00:54:43,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 87 states have internal predecessors, (92), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:54:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2023-11-12 00:54:43,551 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 8 [2023-11-12 00:54:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:43,552 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2023-11-12 00:54:43,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2023-11-12 00:54:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:54:43,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:43,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:43,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:54:43,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:43,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:43,558 INFO L85 PathProgramCache]: Analyzing trace with hash 896972321, now seen corresponding path program 1 times [2023-11-12 00:54:43,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:43,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288845558] [2023-11-12 00:54:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:43,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:43,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:43,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288845558] [2023-11-12 00:54:43,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288845558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:43,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:43,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:54:43,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311529047] [2023-11-12 00:54:43,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:43,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:54:43,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:44,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:54:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:54:44,001 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:44,198 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2023-11-12 00:54:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:54:44,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-12 00:54:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:44,200 INFO L225 Difference]: With dead ends: 99 [2023-11-12 00:54:44,200 INFO L226 Difference]: Without dead ends: 96 [2023-11-12 00:54:44,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:54:44,203 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 168 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:44,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 198 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:54:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-12 00:54:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-12 00:54:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 86 states have internal predecessors, (91), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:54:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2023-11-12 00:54:44,219 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 15 [2023-11-12 00:54:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:44,220 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2023-11-12 00:54:44,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:44,221 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2023-11-12 00:54:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:54:44,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:44,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:44,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:54:44,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:44,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1865049645, now seen corresponding path program 1 times [2023-11-12 00:54:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:44,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229510301] [2023-11-12 00:54:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:44,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:44,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:44,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229510301] [2023-11-12 00:54:44,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229510301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:44,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:44,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 00:54:44,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503838817] [2023-11-12 00:54:44,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:44,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 00:54:44,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:44,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 00:54:44,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:54:44,973 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:45,629 INFO L93 Difference]: Finished difference Result 181 states and 217 transitions. [2023-11-12 00:54:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:54:45,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-12 00:54:45,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:45,631 INFO L225 Difference]: With dead ends: 181 [2023-11-12 00:54:45,632 INFO L226 Difference]: Without dead ends: 175 [2023-11-12 00:54:45,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:54:45,634 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 340 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:45,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 494 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:54:45,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-12 00:54:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2023-11-12 00:54:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 131 states have (on average 1.2671755725190839) internal successors, (166), 145 states have internal predecessors, (166), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-12 00:54:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2023-11-12 00:54:45,663 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 18 [2023-11-12 00:54:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:45,664 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2023-11-12 00:54:45,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2023-11-12 00:54:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:54:45,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:45,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:45,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:54:45,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:45,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:45,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2031360974, now seen corresponding path program 1 times [2023-11-12 00:54:45,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:45,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080165339] [2023-11-12 00:54:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:45,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:46,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:46,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080165339] [2023-11-12 00:54:46,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080165339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:46,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:46,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 00:54:46,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126753359] [2023-11-12 00:54:46,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:46,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:54:46,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:46,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:54:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:54:46,497 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:47,697 INFO L93 Difference]: Finished difference Result 255 states and 311 transitions. [2023-11-12 00:54:47,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:54:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-12 00:54:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:47,701 INFO L225 Difference]: With dead ends: 255 [2023-11-12 00:54:47,702 INFO L226 Difference]: Without dead ends: 252 [2023-11-12 00:54:47,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:54:47,710 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 297 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:47,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 145 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:54:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-12 00:54:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2023-11-12 00:54:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 199 states have (on average 1.2613065326633166) internal successors, (251), 214 states have internal predecessors, (251), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 00:54:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 290 transitions. [2023-11-12 00:54:47,775 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 290 transitions. Word has length 21 [2023-11-12 00:54:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:47,776 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 290 transitions. [2023-11-12 00:54:47,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 290 transitions. [2023-11-12 00:54:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:54:47,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:47,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:47,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:54:47,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:47,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:47,781 INFO L85 PathProgramCache]: Analyzing trace with hash -66680349, now seen corresponding path program 1 times [2023-11-12 00:54:47,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:47,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469738157] [2023-11-12 00:54:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:47,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:48,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:48,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469738157] [2023-11-12 00:54:48,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469738157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:48,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:48,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 00:54:48,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357291460] [2023-11-12 00:54:48,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:48,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:54:48,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:54:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:54:48,515 INFO L87 Difference]: Start difference. First operand 234 states and 290 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:49,648 INFO L93 Difference]: Finished difference Result 252 states and 306 transitions. [2023-11-12 00:54:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:54:49,649 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-12 00:54:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:49,650 INFO L225 Difference]: With dead ends: 252 [2023-11-12 00:54:49,650 INFO L226 Difference]: Without dead ends: 249 [2023-11-12 00:54:49,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:54:49,652 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 335 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:49,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 147 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:54:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-11-12 00:54:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2023-11-12 00:54:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 199 states have (on average 1.256281407035176) internal successors, (250), 214 states have internal predecessors, (250), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 00:54:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 289 transitions. [2023-11-12 00:54:49,713 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 289 transitions. Word has length 24 [2023-11-12 00:54:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:49,713 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 289 transitions. [2023-11-12 00:54:49,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 289 transitions. [2023-11-12 00:54:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-12 00:54:49,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:49,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:49,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:54:49,716 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:49,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:49,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1858713401, now seen corresponding path program 1 times [2023-11-12 00:54:49,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:49,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083218114] [2023-11-12 00:54:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:49,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:50,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:50,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083218114] [2023-11-12 00:54:50,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083218114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:50,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:50,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 00:54:50,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480839961] [2023-11-12 00:54:50,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:50,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:54:50,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:54:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:54:50,735 INFO L87 Difference]: Start difference. First operand 234 states and 289 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:52,050 INFO L93 Difference]: Finished difference Result 251 states and 304 transitions. [2023-11-12 00:54:52,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:54:52,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-11-12 00:54:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:52,053 INFO L225 Difference]: With dead ends: 251 [2023-11-12 00:54:52,053 INFO L226 Difference]: Without dead ends: 248 [2023-11-12 00:54:52,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:54:52,054 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 329 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:52,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 158 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:54:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-12 00:54:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 234. [2023-11-12 00:54:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 199 states have (on average 1.2512562814070352) internal successors, (249), 214 states have internal predecessors, (249), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 00:54:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 288 transitions. [2023-11-12 00:54:52,097 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 288 transitions. Word has length 27 [2023-11-12 00:54:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:52,098 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 288 transitions. [2023-11-12 00:54:52,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 288 transitions. [2023-11-12 00:54:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:54:52,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:52,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:52,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:54:52,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:52,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:52,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1917225074, now seen corresponding path program 1 times [2023-11-12 00:54:52,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:52,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180852019] [2023-11-12 00:54:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:52,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:54:53,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:53,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180852019] [2023-11-12 00:54:53,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180852019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:53,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668437469] [2023-11-12 00:54:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:53,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:53,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:53,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b76a33e-a067-41bc-ba40-10f8ae9a8324/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:54:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:53,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-12 00:54:53,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:54,026 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 00:54:54,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-12 00:54:54,062 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 00:54:54,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-12 00:54:54,092 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 00:54:54,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-12 00:54:54,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2023-11-12 00:54:54,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2023-11-12 00:54:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:54:54,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 14 [2023-11-12 00:54:54,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2023-11-12 00:54:54,567 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 00:54:54,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2023-11-12 00:54:54,592 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 00:54:54,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 00:54:54,843 INFO L322 Elim1Store]: treesize reduction 177, result has 36.1 percent of original size [2023-11-12 00:54:54,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 328 [2023-11-12 00:54:54,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 00:54:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:54:54,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 00:54:54,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 00:54:54,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-12 00:54:55,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:54:55,875 INFO L322 Elim1Store]: treesize reduction 77, result has 24.5 percent of original size [2023-11-12 00:54:55,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 520 treesize of output 442 [2023-11-12 00:54:55,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 234 [2023-11-12 00:54:56,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:54:56,434 INFO L322 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2023-11-12 00:54:56,435 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 105 [2023-11-12 00:54:56,460 INFO L322 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2023-11-12 00:54:56,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2023-11-12 00:54:56,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2023-11-12 00:54:56,556 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 00:54:56,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 44 [2023-11-12 00:54:56,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-12 00:54:56,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-12 00:54:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:56,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:54:57,194 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_358 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_358) |c_~#gl_list~0.base|) (+ |c_~#gl_list~0.offset| 4)) |c_~#gl_list~0.base|))) is different from false [2023-11-12 00:54:57,361 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_358 (Array Int Int)) (v_ArrVal_373 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (not (= (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|) v_ArrVal_373))) (store .cse0 |c_~#gl_list~0.base| (store (select (store .cse0 |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_372) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset| |c_ULTIMATE.start_gl_insert_~node~1#1.base|))) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_358) |c_~#gl_list~0.base|) (+ |c_~#gl_list~0.offset| 4)) |c_~#gl_list~0.base|))) is different from false [2023-11-12 00:54:57,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668437469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:57,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824269474] [2023-11-12 00:54:57,394 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-12 00:54:57,394 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:54:57,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:54:57,403 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:54:57,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:55:04,790 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 189 for LOIs [2023-11-12 00:55:04,965 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 14 for LOIs [2023-11-12 00:55:05,017 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 26 for LOIs [2023-11-12 00:55:05,022 INFO L180 IcfgInterpreter]: Interpretation finished